def test_invalid_codon_start(self):
seqf = SeqFeature(FeatureLocation(5, AfterPosition(12), -1))
seqf.type = "test"
for codon_start in ["-1", "4", "NA"]:
seqf.qualifiers["codon_start"] = [codon_start]
with self.assertRaisesRegex(ValueError, "invalid codon_start"):
Feature.from_biopython(seqf)
def test_feature_type(self):
loc = FeatureLocation(1, 4, strand=1)
with self.assertRaisesRegex(ValueError, "invalid length"):
Feature(loc, feature_type="")
assert Feature(loc, feature_type="A")
assert Feature(loc, feature_type="A"*15)
with self.assertRaisesRegex(ValueError, "invalid length"):
Feature(loc, feature_type="A"*16)
def test_string_conversion(self):
for feature_type in ["protocluster", "cds_motif", "test"]:
for start, end in [(1, 5), (3, 8), (10, 15)]:
feature = Feature(FeatureLocation(start, end, strand=1),
feature_type=feature_type)
assert str(feature) == "%s([%d:%d](+))" % (feature_type, start, end)
feature = Feature(FeatureLocation(start, end, strand=-1),
feature_type=feature_type)
assert str(feature) == "%s([%d:%d](-))" % (feature_type, start, end)
def test_created_by_antismash_conversion(self):
for created in [True, False]:
old = Feature(FeatureLocation(1, 5), feature_type="testtype", created_by_antismash=created)
assert old.created_by_antismash == created
assert old.type == "testtype"
new = Feature.from_biopython(old.to_biopython()[0])
assert new.created_by_antismash == old.created_by_antismash == created
assert new.type == old.type == "testtype"
def test_bridging_fails(self):
parts = [
FeatureLocation(9, 12, strand=1),
FeatureLocation(0, 3, strand=1)
]
with self.assertRaisesRegex(ValueError, "bridge the record origin"):
Feature(CompoundLocation(parts, operator="join"),
feature_type="test")
Feature(CompoundLocation(parts[::-1], operator="join"),
feature_type="test")
def test_biopython_conversion(self):
bio = SeqFeature(FeatureLocation(1, 5))
bio.qualifiers["foo"] = ["bar"]
bio.qualifiers["key_only"] = None
# check that features without types are caught
with self.assertRaisesRegex(ValueError, "invalid length"):
sec = Feature.from_biopython(bio)
bio.type = "test"
sec = Feature.from_biopython(bio)
assert sec.get_qualifier("foo") == tuple(["bar"])
assert sec.get_qualifier("bar") is None
assert sec.get_qualifier("key_only") is True
def test_ordering(self):
feature = Feature(FeatureLocation(10, 40), feature_type="test")
before = Feature(FeatureLocation(5, 30), feature_type="test")
after = Feature(FeatureLocation(20, 40), feature_type="test")
longer = Feature(FeatureLocation(10, 70), feature_type="test")
def check(first, second):
assert first < second
assert first < second.location
assert sorted([second, first]) == [first, second]
check(before, feature)
check(feature, after)
check(feature, longer)
assert sorted([feature, before, after, longer]) == [before, feature, longer, after]
def test_conversion_with_codon_start_reverse(self):
seqf = SeqFeature(FeatureLocation(5, AfterPosition(12), -1))
seqf.type = "test"
for codon_start in "123":
seqf.qualifiers["codon_start"] = [codon_start]
feature = Feature.from_biopython(seqf)
assert feature._original_codon_start == int(codon_start) - 1
assert feature.location.end == AfterPosition(12 - feature._original_codon_start)
new = feature.to_biopython()[0]
assert new.qualifiers["codon_start"] == [codon_start]
assert new.location.start == seqf.location.start
assert new.location.end == seqf.location.end
def setUp(self):
self.feature = Feature(FeatureLocation(10, 40, 1), feature_type="test")
self.get_sub = self.feature.get_sub_location_from_protein_coordinates
def test_negative_locations(self):
loc = FeatureLocation(-2, 500, strand=1)
with self.assertRaisesRegex(ValueError, "negative coordinate"):
Feature(loc, feature_type="")
